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Gray Ooze

Medium · Ooze · CR 1/2 · Unaligned

Source. 5e 2014 Rules

22 (3d8+9)

1/2

Ability Scores

Core attributes and their modifiers.

STR

DEX

-2

CON

INT

-5

WIS

-2

CHA

-4

Overview

Category Monsters

Subcategory Oozes

Size Medium

Type Ooze

Alignment Unaligned

XP 100

Initiative Bonus -2

Movement

Walk 10 ft (3 m)

Swim 5 ft (1.5 m)

Climb 10 ft (3 m)

Crawl 5 ft (1.5 m)

Senses

Blindsight 60 ft (18.3 m)

Passive Perception 8

Skills

Stealth +2

Resistances & Immunities

Damage Resistances

acid, cold, fire

Condition Immunities

blinded, charmed, deafened, exhaustion, frightened, prone

Environments

Caves Mountain Ocean Ruins Sewer Plane of Earth Underworld

Traits

Amorphous

The ooze can move through a space as narrow as 1 inch wide without squeezing.

Corrode Metal

Any nonmagical weapon made of metal that hits the ooze corrodes. After dealing damage, the weapon takes a permanent and cumulative -1 penalty to damage rolls. If its penalty drops to -5, the weapon is destroyed. Nonmagical ammunition made of metal that hits the ooze is destroyed after dealing damage.
The ooze can eat through 2-inch-thick, nonmagical metal in 1 round.

False Appearance

While the ooze remains motionless, it is indistinguishable from an oily pool or wet rock.

Actions

Pseudopod

Cost 1

+3 to hit, reach 5 ft (1.5 m). Hit: 1d6 thunder damage.

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage plus 7 (2d6) acid damage, and if the target is wearing nonmagical metal armor, its armor is partly corroded and takes a permanent and cumulative -1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10.

About Gray Ooze

Gray Ooze is a medium ooze with a Challenge Rating of 1/2. It has a unaligned alignment.

In combat, this creature maintains an Armor Class of 8 and possesses 22 hit points (derived from 3d8+9).

GM Tips: Using Gray Ooze

2 tips available

When using Gray Ooze in your D&D 5e campaign, consider these tactical approaches:

Climbing Advantage: This creature can climb at 10 ft. It can use walls and ceilings for tactical positioning. Consider using 'Spider Climb' negation or fighting in open areas without vertical surfaces.
Amorphous Movement: This creature can squeeze through spaces as small as 1 inch! Traditional barriers are ineffective. Use 'Wall of Force', 'Forcecage', or magical barriers to contain it.

Player Guide: Facing Gray Ooze

2 strategies available

When your party encounters this creature, keep these strategies in mind:

Climbing Defense: This creature can climb at 10 ft! It can use walls and ceilings for surprise attacks. Fight in open areas without vertical surfaces. 'Spider Climb' negation spells can help.
Contain Amorphous Creature: This creature can squeeze through tiny spaces! Traditional barriers won't work. Use 'Wall of Force', 'Forcecage', or magical barriers. 'Create Bonfire' can block movement.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 1.

Solo Encounter:

A single character of level 2 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 75 XP
Hard: 112 XP
Deadly: 150 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Gray Ooze?: Gray Ooze has a Challenge Rating of 1/2, making it appropriate for parties of level 0.5.
What type of creature is Gray Ooze?: Gray Ooze is a Medium Ooze, which affects how certain spells and abilities interact with it.